Multi-type distributed power supply two-stage planning method for restoring force improvement of power distribution network
A technology of distributed power supply and distribution network, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of national economic losses, personal casualties, and the power system cannot be quickly and efficiently black-started, to improve the recovery speed, The effect of improving coordination
Pending Publication Date: 2022-07-01
STATE GRID ZHEJIANG ELECTRIC POWER
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Problems solved by technology
In the case of extreme disasters, how to quickly black start and restore more loads after the power grid is disconnected is not taken into account, so that the power system cannot quickly and efficiently perform black starts after extreme disasters and restore power supply to important loads
Cause equipment damage, personal injury and death, and bring huge losses to the national economy
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[0043] In this embodiment, as figure 1 As shown in the figure, a two-stage planning of multi-type distributed power generation oriented to the improvement of distribution network resilience is carried out according to the following steps: Step 1. According to regional historical disaster data, the failure rate of distribution network lines under different disasters, and the different types of Availability of distributed power DG:
[0044] Step 1.1. Count the failure rates of distribution network lines under different disasters, including the failure rates of distribution network lines corresponding to different levels of typhoons and rainstorms Q={Q 1 ,Q 2 …Q i …Q N }, where Q i Indicates the corresponding failure rate of the i-th line under different levels of typhoons and rainstorms; i=1, 2, ..., N is the line number; N is the number of lines;
[0045] Step 1.2. Count the working states of the distributed power DG in the distribution network under different disasters, i...
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The invention discloses a multi-type distributed power supply two-stage planning method for improving the restoring force of a power distribution network, and the method comprises the steps: 1, carrying out the statistics of the fault rate of a power distribution network line under different disaster conditions according to the regional historical disaster data, and the availability rate of different types of distributed power supplies (DG); 2, simulating and generating a line damage scene after the power distribution network suffers from various types and levels of extreme disasters by using a Monte Carlo method; 3, respectively optimizing the planning positions of distributed photovoltaic, wind power and conventional distributed units for each scene; and 4, respectively counting the optimal planning positions of the distributed power supplies in all scenes included in different disasters, sorting the optimal planning positions in a descending order according to the occurrence times of the positions, and taking the first several positions as the optimal planning positions of the power supplies of the type in the corresponding disasters, wherein the number of the first several positions is the same as the planning number of the power supplies. The method can improve the load power supply capability and the load recovery speed after the power distribution network encounters an extreme disaster, thereby improving the recovery capability of the power distribution network.
Description
technical field [0001] The invention relates to the field of power supply planning of recovery force improvement measures, in particular to a multi-type distributed power supply two-stage planning method for the recovery force improvement of distribution network Background technique [0002] As one of the key infrastructures of the energy system, the power system is the basis for the normal operation of other infrastructures. It not only needs to meet the requirements of reliable operation during normal times, but also needs to maintain the necessary functions and quickly restore the power supply capacity during extreme disasters. In order to improve the resilience of the power system, it is often considered to select and address the power supply by means of power supply planning. In the past, power planning often considered the planning of power types, capacity, investment plans, and environmental protection in the grid under normal circumstances. In the case of extreme di...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H02J3/00H02J3/38G06F30/20
CPCH02J3/001H02J3/381G06F30/20H02J2203/20H02J2300/24H02J2300/28
Inventor 谷纪亭钟宇军王洪良兰洲吴舒泓徐晨博王坤张利军俞楚天孙轶恺邹波文凡杨侃
Owner STATE GRID ZHEJIANG ELECTRIC POWER